JPH11141789A - Method for attaching terminal pin - Google Patents

Method for attaching terminal pin

Info

Publication number
JPH11141789A
JPH11141789A JP9304291A JP30429197A JPH11141789A JP H11141789 A JPH11141789 A JP H11141789A JP 9304291 A JP9304291 A JP 9304291A JP 30429197 A JP30429197 A JP 30429197A JP H11141789 A JPH11141789 A JP H11141789A
Authority
JP
Japan
Prior art keywords
heating wire
terminal pin
projection
cap
injection molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9304291A
Other languages
Japanese (ja)
Inventor
Takayuki Kato
貴行 加藤
Takanori Oouchi
教規 大内
Shosuke Okamoto
正輔 岡本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP9304291A priority Critical patent/JPH11141789A/en
Publication of JPH11141789A publication Critical patent/JPH11141789A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for attaching terminal pins to an electrical-fusion coupling, the method being easy and reliable and excellent in operability. SOLUTION: To attach current-carrying terminal pins to an electrical-fusion coupling manufactured by injection molding an inner and then injection molding an outer after winding a heating wire around the inner, projections 2 each having a bifurcated end are provided near the parts of the inner 1 where the winding of the heating wire 3 are started and terminated, and after the end of the heating wire 3 is hung on the bifurcated end of the projection 2, a cap- shaped terminal pin 4 is pressed against the projection 2 having the heating wire 3 hung thereon, in such a manner that the heating wire 3 makes contact with the interior wall of the terminal pin 4.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電気融着継手の電
熱線に通電するためのターミナルピンの取り付け方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a terminal pin for supplying electricity to a heating wire of an electric fusion joint.

【０００２】[0002]

【従来の技術】近年、軽量で、耐食性に優れ、可撓性が
あるため地震に強いなどの特徴を有するポリエチレンや
ポリブテンなどの熱可塑性樹脂でできた樹脂管がガス管
や水道管などに大量に適用されている。2. Description of the Related Art In recent years, a large number of resin pipes made of thermoplastic resins such as polyethylene and polybutene, which are lightweight, have excellent corrosion resistance, and are resistant to earthquakes due to their flexibility, are used in a large number of gas pipes and water pipes. Has been applied to

【０００３】こうした樹脂管同士を接続する方法の一つ
に電気融着継手を用いる方法がある。電気融着継手は、
接続すべき樹脂管と同じ樹脂からでき、継手内面には電
熱線が埋設され、継手外面にはこの電熱線に接続された
ターミナルピンが設けられており、継手内面と接続すべ
き樹脂管外面を接触させ、ターミナルピンから電熱線に
通電して継手内面と樹脂管外面を融着接合させて樹脂管
同士の接続を行う継手である。One of the methods for connecting such resin tubes is to use an electric fusion joint. Electric fusion joints
It is made of the same resin as the resin pipe to be connected, the heating wire is buried on the inner surface of the joint, and the terminal pin connected to this heating wire is provided on the outer surface of the joint. This is a joint for connecting the resin pipes by bringing them into contact with each other and energizing the heating wire from the terminal pins to fuse and join the inner surface of the joint and the outer surface of the resin tube.

【０００４】継手の種類としては、ソケット、エルボ、
チーズ、サドルなどがあり、その製法には、一例として
次のような方法がある。すなわち、接続すべき樹脂管と
同じ樹脂を用い、ソケット、エルボ、チーズに対しては
筒状の、サドルに対しては円板状のインナーを射出成形
により作製し、インナーにその両端にターミナルピンの
接続された電熱線を配設し、インナーと同じ樹脂を用い
てアウターを射出成形して製造される。ターミナルピン
と電熱線の接続は、ターミナルピンに電熱線が挿入可能
な溝を設け、その溝に電熱線の端部を人手によって挿入
して、溝を潰すいわゆる「かしめ法」で行われる場合が
多い。[0004] Types of joints include sockets, elbows,
There are cheese, saddle, and the like, and examples of the manufacturing method include the following method. That is, using the same resin as the resin pipe to be connected, a cylindrical inner is manufactured by injection molding for the socket, elbow, and cheese, and a disc-shaped inner is formed for the saddle by terminal molding. Is provided by disposing the heating wire connected thereto and injection-molding the outer using the same resin as the inner. The connection between the terminal pin and the heating wire is often carried out by a so-called "caulking method" in which a groove into which the heating wire can be inserted is provided in the terminal pin, and the end of the heating wire is manually inserted into the groove to crush the groove. .

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、このか
しめ法では、電熱線を人手によって溝に挿入するとき
に、アウターの射出成形時などに電熱線が外れないよう
に細心の注意を払いながら電熱線を溝に挿入する必要が
あり、その作業性が非常に悪い。また、作業者の技量に
よりターミナルピンと電熱線の接触不良等の問題も発生
し易く、品質上の安定性にも欠ける。However, in this caulking method, when the heating wire is manually inserted into the groove, the heating wire must be taken with great care so that the heating wire does not come off at the time of outer injection molding or the like. Must be inserted into the groove, and the workability is very poor. In addition, problems such as poor contact between the terminal pin and the heating wire are likely to occur depending on the skill of the worker, and the stability in quality is also lacking.

【０００６】本発明はこのような課題を解決するために
なされたもので、簡便かつ確実で作業性にも優れたター
ミナルピンの取り付け方法を提供することを目的とす
る。The present invention has been made to solve such a problem, and an object of the present invention is to provide a method of attaching a terminal pin which is simple, reliable, and excellent in workability.

【０００７】[0007]

【課題を解決するための手段】上記課題は、インナーを
射出成形し、前記インナーに電熱線を巻いた後、アウタ
ーを射出成形して製造される電気融着継手に通電用のタ
ーミナルピンを取り付けるに際し、前記インナーにおけ
る前記電熱線の巻き開始および終了部分の近傍に先端が
二股に別れた突起物を設け、前記電熱線の掛かった突起
物に、前記電熱線がその内壁に接触するようにキャップ
状のターミナルピンを押し被せるターミナルピンの取り
付け法により解決される。The object of the present invention is to mount an inner terminal by injection molding, wind a heating wire around the inner, and then inject an outer to attach an electric terminal pin to an electric fusion joint manufactured. In this case, a projection having a tip divided into two parts is provided near the winding start and end portions of the heating wire in the inner, and a cap is provided on the projection on which the heating wire is hung so that the heating wire contacts the inner wall thereof. The problem is solved by a method of mounting a terminal pin that pushes over a terminal pin in a shape.

【０００８】インナーにおける電熱線の巻き開始および
終了部分の近傍に先端が二股に別れた突起物を設け、電
熱線の端部を突起物の先端二股部に掛けた後、電熱線の
掛かった突起物に、押し込み時に電熱線が内壁に接触す
るようにキャップ状のターミナルピンを押し被せると、
電熱線は突起物の先端二股部を境にそれぞれ逆方向にタ
ーミナルピンからの摩擦力を受けるので、突起物から外
れることはない。電熱線はターミナルピンの内壁に接触
しているので、ターミナルピンと電熱線の電気的なコン
タクトも確実に行われる。A protrusion having a forked end is provided in the vicinity of the start and end portions of the heating wire in the inner, and the end of the heating wire is hung on the forked end of the protrusion, and then the projection on which the heating wire is applied is provided. When a cap-shaped terminal pin is pushed over an object so that the heating wire contacts the inner wall when pushed in,
The heating wire receives the frictional force from the terminal pin in the opposite direction from the bifurcation of the tip of the projection, so that the heating wire does not come off from the projection. Since the heating wire is in contact with the inner wall of the terminal pin, electrical contact between the terminal pin and the heating wire is also ensured.

【０００９】また、電熱線の端部を突起物の先端二股部
に掛け、キャップ状のターミナルピンを押し被せてター
ミナルピンを取り付ければよいので、本発明法は簡便で
あり、その作業性も優れている。Further, the method of the present invention is simple and the workability is excellent, since the end of the heating wire may be hung on the forked portion of the projection and the terminal pin may be attached by pushing over the cap-shaped terminal pin. ing.

【００１０】キャップ状のターミナルピンの内壁に上向
きの突起を設けると、この突起が樹脂製の突起物に引っ
掛かるので、ターミナルピンの抜けや緩みを防止でき電
熱線との接続がより確実となる。なお、突起が上向きに
設けられているので、ターミナルピンを押し被せるとき
に支障となることはない。When an upward projection is provided on the inner wall of the cap-shaped terminal pin, the projection is caught by a resin-made projection, so that the terminal pin can be prevented from coming off or loosening, and the connection with the heating wire can be made more reliable. In addition, since the protrusion is provided upward, there is no problem when the terminal pin is pushed.

【００１１】また、電熱線の掛かった突起物にキャップ
状のターミナルピンを押し被せた後、ターミナルピンの
側壁に凹みまたは穴を形成させると、凹み部や穴の端部
が樹脂製の突起物に引っ掛かるので、上記の上向きの突
起を設けた場合と同様な効果が得られる。Further, after a cap-shaped terminal pin is pressed over the projection on which the heating wire is applied, a recess or hole is formed in the side wall of the terminal pin, and the recess or the end of the hole is made of resin. Therefore, the same effect as in the case where the upward projection is provided can be obtained.

【００１２】[0012]

【発明の実施の形態】図１に、本発明であるターミナル
ピンの取り付け法の１実施の形態を模式的に示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows one embodiment of a method for mounting a terminal pin according to the present invention.

【００１３】インナー１における電熱線３の巻き開始お
よび終了部分の近傍に先端が二股に別れた突起物２を設
け、電熱線３の端部を突起物２の先端二股部に掛けた
後、電熱線３がその内壁に接触するようにキャップ状の
ターミナルピン４を押し被せれば、ターミナルピン４と
電熱線３の接続を簡便で確実に行うことができる。A protrusion 2 having a forked end is provided near the winding start and end portions of the heating wire 3 in the inner 1, and after the end of the heating wire 3 is hung on the forked end of the protrusion 2, If the cap-shaped terminal pin 4 is pressed so that the heating wire 3 comes into contact with the inner wall thereof, the connection between the terminal pin 4 and the heating wire 3 can be easily and reliably performed.

【００１４】ターミナルピン４の内壁に上向きの突起５
を設けると、この突起５が樹脂製の突起物２に引っ掛か
るので、ターミナルピン４と電熱線３の接続をより確実
なものにすることができる。An upward projection 5 is formed on the inner wall of the terminal pin 4.
Is provided, the projection 5 is hooked on the resin projection 2, so that the connection between the terminal pin 4 and the heating wire 3 can be made more reliable.

【００１５】キャップ状のターミナルピンの頭部は必ず
しも閉じたドーム状になっている必要はなく、外部から
の通電用端子が接続できる形状であれば開口していても
よい。また、押し込み時に電熱線が内壁に接触するよう
になっていれば、必ずしも円筒状である必要もない。The head of the cap-like terminal pin does not necessarily have to have a closed dome shape, but may have an opening as long as it can be connected to an external power supply terminal. Further, if the heating wire comes into contact with the inner wall at the time of pushing, it does not necessarily need to be cylindrical.

【００１６】ターミナルピンは青銅のような柔らかい金
属でできているほうが、電熱線がターミナルピンの内壁
に噛み込まれ、より強固な接触を実現できるので好まし
い。The terminal pins are preferably made of a soft metal such as bronze, because the heating wire is bitten by the inner walls of the terminal pins and a stronger contact can be realized.

【００１７】[0017]

【発明の効果】本発明は以上説明したように構成されて
いるので、簡便かつ確実で作業性にも優れたターミナル
ピンの取り付け方法を提供できる。As described above, the present invention is constructed as described above, so that it is possible to provide a simple and reliable method of mounting a terminal pin which is excellent in workability.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明であるターミナルピンの取り付け法の１
実施の形態を模式的に示す図である。FIG. 1 shows a terminal pin mounting method according to the present invention.
It is a figure showing an embodiment typically.

【符号の説明】[Explanation of symbols]

１ インナー ２ インナーに設けられた突起物 ３ 電熱線 ４ ターミナルピン ５ ターミナルピンの内壁に設けられた突起 DESCRIPTION OF SYMBOLS 1 Inner 2 Projection provided in inner 3 Heating wire 4 Terminal pin 5 Projection provided in inner wall of terminal pin

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 インナーを射出成形し、前記インナーに
電熱線を巻いた後、アウターを射出成形して製造される
電気融着継手に通電用のターミナルピンを取り付けるに
際し、前記インナーにおける前記電熱線の巻き開始およ
び終了部分の近傍に先端が二股に別れた突起物を設け、
前記電熱線の端部を前記突起物の先端二股部に掛けた
後、前記電熱線の掛かった突起物に、前記電熱線がその
内壁に接触するようにキャップ状のターミナルピンを押
し被せるターミナルピンの取り付け法。1. An injection molding of an inner, a heating wire wound around the inner, and then, when attaching a terminal pin for energization to an electric fusion joint manufactured by injection molding of an outer, the heating wire in the inner. In the vicinity of the winding start and end parts, a projection with the tip split into two branches is provided,
A terminal pin that, after hanging the end of the heating wire on the forked portion of the projection, presses the cap-shaped terminal pin on the projection on which the heating wire is applied so that the heating wire contacts the inner wall thereof. Mounting method. 【請求項２】 前記キャップ状のターミナルピンの内壁
に上向きの突起が設けられているターミナルピンを用い
る請求項１に記載のターミナルピンの取り付け法。2. The method according to claim 1, wherein a terminal pin having an upward projection is provided on an inner wall of the cap-shaped terminal pin. 【請求項３】 前記電熱線の掛かった突起物に前記キャ
ップ状のターミナルピンを押し被せた後、前記ターミナ
ルピンの側壁に凹みまたは穴を形成させる請求項１に記
載のターミナルピンの取り付け法。3. The method according to claim 1, wherein the cap-shaped terminal pin is pressed over the projection on which the heating wire is applied, and then a recess or hole is formed in a side wall of the terminal pin.
JP9304291A 1997-11-06 1997-11-06 Method for attaching terminal pin Pending JPH11141789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9304291A JPH11141789A (en) 1997-11-06 1997-11-06 Method for attaching terminal pin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9304291A JPH11141789A (en) 1997-11-06 1997-11-06 Method for attaching terminal pin

Publications (1)

Publication Number Publication Date
JPH11141789A true JPH11141789A (en) 1999-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP9304291A Pending JPH11141789A (en) 1997-11-06 1997-11-06 Method for attaching terminal pin

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Country Link
JP (1) JPH11141789A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002283387A (en) * 2001-03-22 2002-10-03 Sekisui Chem Co Ltd Method for manufacturing electrofusion joint
CN110065201A (en) * 2019-05-31 2019-07-30 海力士五金机电(昆山)有限公司 A kind of mold core binding post automatic supplier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002283387A (en) * 2001-03-22 2002-10-03 Sekisui Chem Co Ltd Method for manufacturing electrofusion joint
JP4574881B2 (en) * 2001-03-22 2010-11-04 積水化学工業株式会社 Manufacturing method of electrofusion joint
CN110065201A (en) * 2019-05-31 2019-07-30 海力士五金机电(昆山)有限公司 A kind of mold core binding post automatic supplier
CN110065201B (en) * 2019-05-31 2024-02-27 海力士五金机电(昆山)有限公司 Automatic feeding device for mold core binding posts

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